Lung cancer patients with no metastasis in all examinations cannot determine whether bone scan will find bone metastasis. Lung cancer patients should improve relevant auxiliary examinations, such as chest CT, cranial CT or magnetic resonance, cervical lymph node ultrasound, abdominal CT, etc., to understand the specific situation of the tumor and whether there is distant metastasis, to evaluate the condition and to provide basis for the treatment plan. If no metastasis is found in the examinations except bone scan, it means that the disease is relatively early, but it is not certain whether bone metastasis has occurred, and then it is necessary to improve the bone scan examination to exclude bone metastasis. It is recommended that the patient improve the examination under the guidance of the doctor to clarify the condition and receive standardized treatment.